NEW DELHI (AP) — A man has punched the chief of India’s anti-corruption party twice in the face during a campaign stop in the capital, three days before the start of national elections in the world’s biggest democracy.

The motive for the attack Friday on Arvind Kejriwal, the head of the Aam Admi Party, or Common Man’s Party, was not immediately known.

Party official Devendra Sehrawat said supporters overpowered the attacker and handed him over to police. He was not immediately identified.

Kejriwal appealed to party members to stay calm and not be provoked by the attack.

During the past month, Kejriwal’s opponents have damaged the windshield of his car with sticks and thrown eggs and ink at him.

His upstart party had a surprisingly strong showing in local elections late last year.